I extracted the zip, and copied the files over to the Bootcamp USB drive.

Back in Bootcamp Assistant, chose "install windows" option, created my partition (100gb), it seemed to be zipping along then it restarted my laptop and booted into the windows installer.

Windows installer stated that it could not find the necessary drivers, and to insert the disc containing them. There was an option to select folders on the hard drive which contain the files, but it said it could not find them in any of the folders.

So.. what did I do wrong? Where should the support files be extracted to? Does it need to be an entirely separate USB from the Windows 7 USB? ugh. Not sure why this isn't working.